<!DOCTYPE html>
<html>
	<head>
		<meta charset="utf-8">
		<title></title>
		<script>
			var a=10,b=20
			console.log(a+b)
			console.log(typeof(a))
			var c="abc"
			console.log(typeof(c))
		</script>
	</head>
	<body>
	</body>
</html>
